3lambda/4 post coupler for drift-tube linacs

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5909496

Billen, J H; Garcia, J A; Potter, J M; Spalek, G

New permanent magnets for quadrupole focusing make possible smaller drift tubes in drift-tube linacs (DTLs), resulting in higher shunt impedance. However, ordinary post couplers cannot stabilize a DTL whose drift-tube-to-wall spacing exceeds one-quarter wavelength (lambda/4) by more than a few per cent for the accelerating mode frequency. We have built and tested post couplers that operate in the 3lambda/4 mode. These 3lambda/4 post couplers, when substituted for lambda/4 couplers, had similar stabilization properties. In addition, the coupling between post and drift tube, and the post's resonant frequency can be independently adjusted. 5 refs., 5 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5909496
• Report Number(s): LA-UR-85-1332; CONF-850504-13; ON: DE85010753
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
COUPLING
DRIFT TUBES
LINEAR ACCELERATORS
RF SYSTEMS
STABILIZATION
TUNING